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(No Model.)

2 Sheets-Sheet l..

J. LEIGHTHAM.

BOILER.

Patented Sept. 25, 1888.

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2 Sheets-Sheet 2.

(No Model.)

J. LEIGHTHAM. r BOILER. 180.389.9639. 'Patented Sept. 25, 1888.

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ATTORNEYS.

-UNTTED STATES PATENT @EETQE.

JOSEPH LEIGHTHAM, OF RFADING, PENNSYLVANIA, ASSIGNOR OF ONE- HALF TO D.& E. KREMP, OF SAME PLACE.

. BOILER.

QPECIFIOATION forming part of Letters Patent No. 389,969, datedSeptember 25, 1888.

(N0 model.)

T0 all whom it-may concern.-

Be it known that I, J osEPH LEIGHTHAhLof Reading, in the county of Berksand State of Pennsylvania, have invented a new and Improved Boiler,ofwhich the following is a full, clear, and exact description.

My invention relates to an improvement in boilers, especially adaptedfor rolling-mills and similar shops, and has for its object to protectthe boiler over the neck of the furnace, to in crease theheating-surface,utilize the products of combustion to the utmost, andintroduce the water in a heated state to the boiler.

The invention consists in the construction and combination of theseveral parts, as will be hereinafter fully set forth, and pointed outin the claims.

Reference is to be had to the accompanying drawings,formingapart ofthisspecification,iu which similar figures of reference indicatecorresponding parts in both views.

Figure 1 is a central longitudinal and vertical section through theboiler, and Fig. 2 is a transverse section through the same.

Heretofore boilers in rolling-mills and similar shops have beenconstructed without tubes, the fire from the furnace coming in passingcontact with the shell only. By this means much of the products ofcombustion has been wasted and the said products of combustion impingingdirectly upon the shell opposite theirpoint ofentrance burn out thesurface in a short time.

To overcome these objections is the prime object of thepresentinvention. To that end, within a suitable casing or setting,10,aboiler, 11, is longitudinally and horizontally supported in anysuitable manner. Above and connected with the boiler asteam-domc, 12, isprovided, having apertures 13 for the application of safety-valves, amanhole, 14, and outlet 15. Through the boiler a series of longitudinaltubes, 16, are projected, around which the water is designed to lie,and. th rough which the products of combustion are designed to pass.

Below the boiler and within the casing one or more longitudinal heaters,17, are suspended by means of the tubular connections 18 uniting themwith the boiler, and by means of a which they project, being at thatpoint pro vided with a removable or detachable cap, 19, whereby entranceis effected for the purpose of cleaning. From the heater or heaters 17 atubular connection, 21, is effected with any ordinary or approved formof mud-drum,22,located without the boiler-casing, and to which water issupplied as and in a manner found in practice most desirable. In theunder side of the casing 10, near what I designate the front end, theneck 23 of the furnace is inbottom, substantially near the furnace-neck,a series of apertures, 24, are produced, the said apertures beingcollectively surrounded by the upper enlarged end of a segmental orhornshaped tube, 26,the smaller end of which horn like tube is projectedthrough the boiler-casing at the front end, and provided with adetachable cap,27, similarto the cap ofthe heater and for the samepurpose, and also with a tap or petcock, 28.

essentially above the neck of the furnace. The boiler is of less lengththan the casing,a space being made to intervene the head of the formerand the ends of the latter,of which the forward space is divided by apartition, 29, so that a ducts of combustion from the boiler-tubes, andfrom which chamber the waste products of combustion are taken off by adue, 31.

In operation the water entering the muddrum passes up into the heaters,and from them to the boiler, and through the boilerapertures 24 into thehorn26, as illustrated. The products of combustion rushing up throughthe neck of the furnace are deflected by the convex surface of the horn,caused to travel rearward in contact with the boiler and heater throughthe boiler-tubes and outward through the off-take flue. The products ofcombustion impinging upon the surface of the horn do not injure the sameowing the glancing surface of contact and the fact that the tube is keptconstantly filled with water.

Having thus fully described my invention, I

support in one end of the boilcrcasing through The convex surface of thehorn-like tube is chamber, 30, is provided, receiving the pro troduced,and at that point in the boilerclaim as new and desire to secure byLetters Patent- 1. The conihination,with a boiler provided at itsfire-contact surface with a series ofapertures, of a curvedshielding-tube surrounding said apertures, substantially as and for thepurpose herein set forth.

2. The combination, with a boiler provided with a series of apertures inthe fire-contact surface, and a casing provided with a fire-inlet insubstantial alignment with said apertures, of a curved shielding-tubesurrounding said apertures, having its convex surface presented to thetirei nlet, substantially as and for the purpose specified.

3. In a boiler for rolling-mills and similar establishments,thecoinbination,with the shell having provided in the under surfaeea seriesof apcrtu res, and aseries of longitudinal tubes projected through fromend to end of the shell, of a horn-like tube inelosing said apertures,as and for the purpose specified.

4?. In a boiler for rolling-mills and similar establish 1nents,thecombination with the shell having a series of apertures produced in thebottom, andaseries of longitudinal tubes projected through the shellfrom end to end, of a horn like tube inclosing said apertures, asteam-dome connected with the shell at the top, and heaters below theshell connected therewith, substantially as and for the purposespecified.

5. In a boiler for rolling'mills and similar establish me11ts,theeo1nbination,with the shell provided with apertures in the bottom, tubesprojected throughthe shell from end to end, a casing surrounding theshell, and a partition at one end of the casing dividing the same intotwo compartments, of a horn-like tube surrounding the shell-aperturesabove the furnace-opening in the casing, and Water-heaters suspendedWithin the casing beneath the shell and connected therewith,substantially as and for the purpose set forth.

JOSEPH LEEGHTHAM.

Witnesses:

F. 1. KREMP,

P. Sounneu.

